well curiousity got the best of me and I went out and looked... the FS number is: FS34128 ... Vallejo sells it as Flat Green, Humbrol colors it is number 131, several websites said RLM 83 is the shade (available through many paint makers including MM)
I just looked at this website and "Color of Eagles" acrylics is actually part of Aeromaster paints so that might be a good bet - order RLM 83 by Color of Eagles paint from www.greatmodels.com and it sounds like you will be ok!
the website:
http://modelingmadness.com/scotts/axis/luft/me/109/has109k.htm